$ln\left(\frac{e^x}{3}\right)$
$\lim_{x\to5}\left(\frac{cos7x-1}{x^2}\right)$
$\frac{dy}{dx}=-2x-3$
$\left(4a^3+4y\right)^2$
$9-x>4$
$\frac{1}{\sqrt{4xy}}$
$16v=-64$
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